JPH01178363A - Method and device for pouring molten metal - Google Patents
Method and device for pouring molten metalInfo
- Publication number
- JPH01178363A JPH01178363A JP81588A JP81588A JPH01178363A JP H01178363 A JPH01178363 A JP H01178363A JP 81588 A JP81588 A JP 81588A JP 81588 A JP81588 A JP 81588A JP H01178363 A JPH01178363 A JP H01178363A
- Authority
- JP
- Japan
- Prior art keywords
- molten metal
- nozzle
- inert gas
- pouring
- injection
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000002184 metal Substances 0.000 title claims abstract description 39
- 238000000034 method Methods 0.000 title claims description 14
- 239000011261 inert gas Substances 0.000 claims abstract description 20
- 239000012210 heat-resistant fiber Substances 0.000 claims abstract description 11
- 238000007789 sealing Methods 0.000 claims abstract description 6
- 238000002347 injection Methods 0.000 claims description 40
- 239000007924 injection Substances 0.000 claims description 40
- 230000000903 blocking effect Effects 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 2
- 239000007789 gas Substances 0.000 claims 1
- 238000000465 moulding Methods 0.000 claims 1
- 229910000831 Steel Inorganic materials 0.000 abstract description 8
- 239000010959 steel Substances 0.000 abstract description 8
- 239000000956 alloy Substances 0.000 abstract description 3
- 229910045601 alloy Inorganic materials 0.000 abstract description 3
- 238000009835 boiling Methods 0.000 abstract description 3
- 230000002950 deficient Effects 0.000 abstract description 3
- 230000003647 oxidation Effects 0.000 abstract description 3
- 238000007254 oxidation reaction Methods 0.000 abstract description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 239000001301 oxygen Substances 0.000 abstract description 2
- 229910052760 oxygen Inorganic materials 0.000 abstract description 2
- 238000005266 casting Methods 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 239000010425 asbestos Substances 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 229910052895 riebeckite Inorganic materials 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
Abstract
Description
本発明は、金属溶湯を鋳造や別容器への移注のために注
入管に注入する方法の改良に関し、それを実施する注入
装置をも包含する。The present invention relates to an improvement in a method for injecting molten metal into an injection pipe for casting or transfer to another container, and also includes an injection device for carrying out the method.
たとえば鋼を鋳造して鋼塊を得ようとする場合の代表的
な作業は、取鍋内の溶鋼を鍋の底部に設けたノズルから
出して下注ぎ造塊鋳型の注入管に流し込み、湯道を通し
て複数の鋳型内に供給することである。 このとき、注
入管や鋳型の内部は、あらかじめアルゴンのような不活
性ガスで置換しておくことが行なわれている。
それでも、ノズル先端と注入管の上端とはある程度の間
隔があるため、取鍋を出た溶鋼が注入管に入るまでの間
に大気と接触することが避けられない。 大気との接触
は、合金成分の酸化を招いたり、巻き込まれた大気によ
って鋳型内でボイリング現象が起ったりして好ましくな
い。 よく知られているように、これらは鋳塊中の介在
物を増大させ、鋼の品質を低下させる。
そこで出願人は、このような問題点を解決した金属溶湯
注入装置を提案した（特願昭６１−２０９９７４号）。
その装置は、溶湯の流路を耐熱性繊維成形体でとり囲
んで大気と遮断する点に特徴があり、これによって介在
物不良は大幅に軽減された。
それでも、溶湯の注入初期、すなわち捨湯後に溶湯が注
入管の耐火物を直撃しないよう、ノズルの中心を注入管
の中心に合わせるまでの間は、溶湯と大気が接触してし
まう。 きわめて高品質の特殊鋼などを製造するには、
この注入初期の大気との接触をも防止する必要がある。For example, when casting steel to obtain a steel ingot, the typical process is to pour the molten steel in the ladle through a nozzle installed at the bottom of the ladle and pour it into the injection pipe of the under-pouring ingot mold. It is to feed into multiple molds through. At this time, the interior of the injection pipe and mold is replaced with an inert gas such as argon in advance. Even so, since there is a certain distance between the nozzle tip and the upper end of the injection tube, it is inevitable that the molten steel leaving the ladle will come into contact with the atmosphere before entering the injection tube. Contact with the atmosphere is undesirable because it causes oxidation of the alloy components and the entrained atmosphere causes boiling within the mold. As is well known, these increase inclusions in the ingot and reduce the quality of the steel. Therefore, the applicant proposed a molten metal injection device that solved these problems (Japanese Patent Application No. 209974/1982). The device is characterized by surrounding the molten metal flow path with a heat-resistant fiber molded body to isolate it from the atmosphere, which greatly reduces inclusion defects. Even so, the molten metal comes into contact with the atmosphere at the beginning of the molten metal injection, that is, until the center of the nozzle is aligned with the center of the injection pipe to prevent the molten metal from directly hitting the refractories of the injection pipe after the molten metal is discarded. To produce extremely high quality special steel, etc.
It is also necessary to prevent contact with the atmosphere during this initial stage of injection.
【発明が解決しようとする課題１
本発明の目的は、金属溶湯の注入初期においても、金属
溶湯と外気の接触を防止した金属溶湯の注入方法、およ
びそれを実施するための装置を提供することにおる。
［課題を解決するための手段］
本発明の金属溶湯の注入方法は、溶湯容器の底部に設け
たノズルから溶湯を注入管に注入する方法において、注
入管の口部に耐熱性繊維成形体のリングをのせ注入管内
部の空気を不活性ガスで置換した後、第１図に示すよう
に、ノズル２から流下する溶湯５の周囲をノズルに設け
たフランジ２１から噴出する不活性ガスのカーテン６で
シールしつつ注入を開始し、ノズル２の中心を注入管３
の中心に合致させたところで、第２図に示すように、溶
湯容器１を下げ、上記フランジ２１を上記リング４に接
触させることにより外気を遮断しながら注入を続けるこ
とを特徴とする。
このような方法を実施するための本発明の金属溶湯の注
入装置は、第１図および第２図に示すように、溶湯容器
１の底部に設【プたノズル２から溶湯５を注入管３に注
入する装置において、注入管３の口部に耐熱性繊維成形
体のリング４をのせノズル２の下部に、それを環状にと
り囲む不活性ガスの吹出し口２２を有するフランジ２１
を設けて不活性ガス源に接続し、ノズルから流下する溶
湯５の周囲に不活性ガスのカーテンを形成するように構
成したことを特徴とする。
フランジ２１は、ノズル２と別体に製作し、その間の気
密を保ちつつ上下に多少は移動できるようにしておくこ
とが好ましい。 耐熱性繊維成形体のリングは、ある程
度変形して緩衝作用をすることができるが、上記のよう
にすれば、フランジをリングに接触させたときのショッ
クを、いっそうやわらげることができる。 ノズルとフ
ランジの気密を保つシールパツキンには、耐熱性繊維を
ひも状にしたものを使用すればよい。
不活性ガスの吹出し口は、ノズルの中心を中心とする環
状スリットであっても、多数の孔を環状に並べたもので
あっても、いずれにせよ不活性ガスのカーテンにより溶
湯を外気から遮断できるものであればよい。
耐熱性繊維成形体としては、ガラス繊維、セラミックス
繊維、アスベストＡ７−ンなどをリング状に成形したも
のを用いる。 市販の材料の中では、商品名「カオウー
ル」として知られるアルミナ繊維などが好適でおる。
【作 用】
上記したように、溶湯の注入を開始するときから、すて
に溶湯のまわりに不活性ガスのカーテンをつくり、大気
との接触を防止するとともに、注入管内に大気が巻き込
まれることを防ぎ、ノズルの中心と注入管の中心が合致
したところで直ちにノズルのフランジを耐熱性繊維成形
体のリングに接触させることによって、大気との完全な
遮断が行なわれる。 注入管および溶湯を受は入れる側
の容器、鋳造の場合には鋳型の内部をあらかじめ不活性
ガスで置換しておくことにより、金属溶湯は、注入開始
時から終了時に至るまで、金属溶湯と大気が接触するこ
とが全くない。[Problems to be Solved by the Invention 1] An object of the present invention is to provide a method for pouring molten metal that prevents contact between the molten metal and the outside air even in the initial stage of pouring the molten metal, and an apparatus for carrying out the method. I'm in the middle of the day. [Means for Solving the Problems] The molten metal injection method of the present invention involves injecting molten metal into an injection pipe from a nozzle provided at the bottom of a molten metal container, in which a heat-resistant fiber molded body is placed at the mouth of the injection pipe. After the ring is placed and the air inside the injection tube is replaced with inert gas, as shown in FIG. Start injection while sealing with
2, the molten metal container 1 is lowered and the flange 21 is brought into contact with the ring 4 to continue pouring while blocking outside air. The molten metal injection device of the present invention for carrying out such a method, as shown in FIGS. In an apparatus for injecting into a liquid, a ring 4 of a heat-resistant fiber molded body is placed on the mouth of an injection pipe 3, and a flange 21 having an inert gas outlet 22 surrounding the nozzle 2 in an annular manner is placed at the bottom of the nozzle 2.
is connected to an inert gas source to form an inert gas curtain around the molten metal 5 flowing down from the nozzle. It is preferable that the flange 21 be manufactured separately from the nozzle 2 so as to be able to move up and down to some extent while maintaining airtightness therebetween. A ring made of a heat-resistant fiber molded body can be deformed to some extent to provide a buffering effect, but by doing so as described above, the shock caused when the flange is brought into contact with the ring can be further reduced. The seal gasket that keeps the nozzle and flange airtight may be made of string-like heat-resistant fibers. Whether the inert gas outlet is an annular slit centered at the center of the nozzle or a large number of holes lined up in an annular arrangement, the inert gas curtain isolates the molten metal from the outside air. It's fine as long as it's possible. As the heat-resistant fiber molded product, a ring-shaped product made of glass fiber, ceramic fiber, asbestos A7-tone, or the like is used. Among commercially available materials, alumina fibers known under the trade name "Kao Wool" are suitable. [Function] As mentioned above, from the time the injection of molten metal starts, a curtain of inert gas is created around the molten metal to prevent contact with the atmosphere and to prevent the atmosphere from being drawn into the injection pipe. The flange of the nozzle is brought into contact with the ring of the heat-resistant fiber molded body as soon as the center of the nozzle and the center of the injection tube coincide, thereby completely blocking the air from the atmosphere. By replacing the inside of the injection pipe, the container that receives the molten metal, and the mold in the case of casting with an inert gas in advance, the molten metal is kept close to the atmosphere from the start of injection to the end. There is no contact at all.
本発明の金属溶湯注入方法によれば、大気中の酸素によ
る溶湯中の合金成分の酸化や、巻き込まれた大気による
ボイリングを防止することができ、介在物による不良品
の発生がほとんどない。 従って、極度に高品質を要求
される特殊鋼の製造が容易になるし、不良率の低減によ
る経済的な利益も得られる。
本発明の注入装置を使用すれば、容易にこのような方法
が実施できる。According to the molten metal injection method of the present invention, it is possible to prevent oxidation of alloy components in the molten metal due to oxygen in the atmosphere and boiling due to the trapped atmosphere, and there is almost no occurrence of defective products due to inclusions. Therefore, it becomes easier to manufacture special steel that requires extremely high quality, and economic benefits can also be obtained by reducing the defective rate. By using the injection device of the present invention, such a method can be easily carried out.
図面は、いずれも本発明の注入方法および注入装置を説
明するためのものであって、第１図は注入開始時の不活
性ガスによるシールの状況を、第２図は注入中の耐熱性
繊維成形体による大気遮断の状況をそれぞれ示す、注入
装置の主要部分の断面図である。
１・・・金属溶湯容器
２・・・ノズル
２１・・・フランジ
２２・・・不活性ガス吹出し口
３・・・注入管
４・・・耐熱性繊維成形体のリング
５・・・金属溶湯
６・・・不活性ガスのカーテン
特許出願人 大同特殊鋼株式会社
代理人 弁理士 須 賀 漁 夫
第１図The drawings are for explaining the injection method and injection device of the present invention. Figure 1 shows the state of sealing with inert gas at the start of injection, and Figure 2 shows the state of sealing with inert gas during injection. FIG. 3 is a cross-sectional view of the main parts of the injection device, each showing a situation in which the molded body blocks the atmosphere. 1... Molten metal container 2... Nozzle 21... Flange 22... Inert gas outlet 3... Injection pipe 4... Ring of heat-resistant fiber molded body 5... Molten metal 6 ...Inert gas curtain patent applicant Daido Steel Co., Ltd. agent Patent attorney Isao Suga Figure 1
Claims (3)
に注入する方法において、注入管の口部に耐熱性繊維成
形体のリングをのせ、注入管の内部の空気を不活性ガス
で置換した後、ノズルから流下する溶湯の周囲を、ノズ
ルに設けたフランジから噴出する不活性ガスのカーテン
でシールしつつ注入を開始し、ノズルの中心を注入管の
中心に合致させたところで溶湯容器を下げ、上記フラン
ジを上記リングに接触させることにより外気を遮断しな
がら注入を続けることを特徴とする金属溶湯の注入方法
。(1) In a method in which molten metal is injected into an injection tube from a nozzle provided at the bottom of a molten metal container, a ring of heat-resistant fiber molding is placed on the mouth of the injection tube, and the air inside the injection tube is replaced with inert gas. After that, injection begins while sealing the molten metal flowing down from the nozzle with a curtain of inert gas spouted from a flange provided on the nozzle, and when the center of the nozzle is aligned with the center of the injection pipe, the molten metal container is closed. A method for pouring molten metal, the method comprising: lowering the metal and continuing pouring while blocking outside air by bringing the flange into contact with the ring.
に注入する装置において、注入管の口部に耐熱性繊維成
形体のリングをのせ、ノズルの下部に、それを環状にと
り囲む不活性ガスの吹出し口を有するフランジを設けて
不活性ガス源に接続し、ノズルから流下する溶湯の周囲
に不活性ガスのカーテンを形成するように構成したこと
を特徴とする金属溶湯の注入装置。(2) In a device that injects molten metal into an injection pipe from a nozzle provided at the bottom of a molten metal container, a ring of heat-resistant fiber molded material is placed on the mouth of the injection pipe, and an inert ring surrounding it in an annular shape is placed at the bottom of the nozzle. 1. A molten metal injection device, characterized in that a flange having a gas outlet is connected to an inert gas source to form an inert gas curtain around the molten metal flowing down from the nozzle.
気密を保ちつつ上下に移動できるように設けた請求項２
の注入装置。(3) Claim 2, wherein the flange is separate from the nozzle and is provided so as to be movable up and down while maintaining airtightness therebetween.
injection device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP81588A JPH01178363A (en) | 1988-01-06 | 1988-01-06 | Method and device for pouring molten metal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP81588A JPH01178363A (en) | 1988-01-06 | 1988-01-06 | Method and device for pouring molten metal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01178363A true JPH01178363A (en) | 1989-07-14 |
Family
ID=11484170
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP81588A Pending JPH01178363A (en) | 1988-01-06 | 1988-01-06 | Method and device for pouring molten metal |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01178363A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100515043B1 (en) * | 2000-09-05 | 2005-09-15 | 주식회사 포스코 | Sealing apparatus for preventing the re-oxidation of the molten steel in the continuous casting molder |
| CN104607627A (en) * | 2015-02-27 | 2015-05-13 | 马钢(集团)控股有限公司 | Sealing structure for steel ladle long nozzle |
| CN106881457A (en) * | 2017-03-28 | 2017-06-23 | 马鞍山钢铁股份有限公司 | Molten steel pours device and part is sealed with argon and the method that part carries out argon envelope is sealed using argon |
| KR102207021B1 (en) * | 2019-07-16 | 2021-01-26 | (주)홍일티에스엠 | Air ring for forging process |
| CN115161433A (en) * | 2022-07-22 | 2022-10-11 | 北京科技大学 | Steel ladle wire feeding device protected by double-layer air curtain |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61206559A (en) * | 1985-03-12 | 1986-09-12 | Daido Steel Co Ltd | Gas sealing method for molten steel flow |
-
1988
- 1988-01-06 JP JP81588A patent/JPH01178363A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61206559A (en) * | 1985-03-12 | 1986-09-12 | Daido Steel Co Ltd | Gas sealing method for molten steel flow |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100515043B1 (en) * | 2000-09-05 | 2005-09-15 | 주식회사 포스코 | Sealing apparatus for preventing the re-oxidation of the molten steel in the continuous casting molder |
| CN104607627A (en) * | 2015-02-27 | 2015-05-13 | 马钢(集团)控股有限公司 | Sealing structure for steel ladle long nozzle |
| CN106881457A (en) * | 2017-03-28 | 2017-06-23 | 马鞍山钢铁股份有限公司 | Molten steel pours device and part is sealed with argon and the method that part carries out argon envelope is sealed using argon |
| KR102207021B1 (en) * | 2019-07-16 | 2021-01-26 | (주)홍일티에스엠 | Air ring for forging process |
| CN115161433A (en) * | 2022-07-22 | 2022-10-11 | 北京科技大学 | Steel ladle wire feeding device protected by double-layer air curtain |
| CN115161433B (en) * | 2022-07-22 | 2023-12-15 | 北京科技大学 | Ladle wire feeding device with double-layer air curtain protection |
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